Synthesis and characterization of novel niccolites [(CH3)2NH2][FeIIIMII(HCOO)6] (MII = Zn, Ni, Cu)

作者： Aneta Ciupa , Mirosław Mączka , Anna Gągor , Adam Pikul , Maciej Ptak

关键词: Diffraction 、 Crystallography 、 Hydrogen bond 、 Raman spectroscopy 、 Monoclinic crystal system 、 Static disorder 、 Chemistry 、 Trigonal structure 、 Characterization (materials science) 、 Paramagnetism

摘要: We report the synthesis, X-ray diffraction, thermal, magnetic, Raman and IR studies of three heterometallic MOFs, [(CH3)2NH2][FeIIIMII(HCOO)6] with M = Zn (DMFeZn), Ni (DMFeNi) Cu (DMFeCu), crystallizing in niccolite type structure. DMFeZn DMFeNi crystallize trigonal structure (space group P1c) while DMFeCu crystallizes monoclinic C2/c). Magnetic investigation shows that remains paramagnetic down to lowest temperature obtained our experiment exhibit ferromagnetic order below 42 28.5 K, respectively. data confirm structural model show evidence for stronger hydrogen bonds when compared DMFeNi. A different bond network is responsible behavior these compounds upon cooling, is, exhibits a sign short range ordering dimethylammonium cations at low temperatures analogues evolution dynamic disorder into static disorder.

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Synthesis and characterization of novel niccolites [(CH3)2NH2][FeIIIMII(HCOO)6] (MII = Zn, Ni, Cu)

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Synthesis and characterization of novel niccolites [(CH3)2NH2][FeIIIMII(HCOO)6] (MII = Zn, Ni, Cu)

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